Deflecting beam for warp threads in a weaving machine

ABSTRACT

The deflecting beam is constructed so as to be deformed under the tension force imparted to the ground warp threads during the beating up of the reed of the loom. The amount of deformation is designed to facilitate forward movement of the pile warps during a full beat of the reed. The guide beam can be constructed in any number of ways and in any number of shapes to effect the required deformation.

States V atem 1 1 Piarrwaller Mar."18, 1975 [54] DEFLECTING BEAM FORWARP THREABS 1,707,334 4/1929 Turner 139/114 I MA E 2,442,7 6 6 1948oung IN A WEAV NG CHIN 2,589,498 3/1952. Kulczycki et al. Inventor:lsirwin Pfarrwaller, Wmterthur, 2,932,325 4/1960 Patrick 139/102 xwitzerland FOREIGN PATENTS OR APPLICATIONS [73] Asslgnee: Bmhmwmterthur, 4,333 0/1890 United Kingdom 139/114 Swltlerland 777 0/1852United Kingdom 139/114 [22] Filed: Dec. 11, 1972 Primary Examiner-JamesKee Chi [21] Appl' 314102 Attorney, Agent, or FirmKenyon & Kenyon ReillyCarr & Chapin [30] Foreign Application Priority Data Dec. 10, 1971Switzerland l8030/7l [57] ABSTRACT The deflecting beam is constructed'soas to be de- [52] US. Cl 139/114, l39/25,ll3399//1907 formed under thetension force imparted to the ground warp threads during the beating upof the reed 2g fa g 2 vof the loom. The amount of deformation isdesigned to 1 1e 0 139/97 1 6 A 1 facilitate forward movement of thepile warps during a full beat of the reed. The guide beam can beconstruc ted in any number of ways and in any number of [56] uNlTE g ggxfigs giiENTs shapes to effect the required deformation. 1,705,6373/1929 Deleu 139/114 12 Claims 12 Drawing Figures PATENTED 1 819??)SHEET 2 [1F 5 PATENTEB MAR l 8 I975 sum 5 or 5 DEFLECTING BEAM FOR WARPTHREADS IN A WEAVING MACHINE This invention relates to a guide means forwarps in a loom and more particularly to a pile warp tension beam in aterry cloth loom.

Terry cloth looms have been known to have at least two warp beams,namely one beam for forming the group fabric having relatively tightlytensioned ground warp threads which are to be bound or woven with weftthreads, and a second beam for the pile warp threads that are under muchless tension or that are, even during the weaving process, in a knownway relaxed briefly at suitable intervals of time. As is known, the pilewarp threads are distributed across the entire width of the warp threadsin correspondence to the desired pattern to be woven and are drawnthrough a shed, and woven into the fabric by means of a reed. During theweaving operation, pile loops are formed by the pile warp threads in theweaving plane through a periodically effected forward and backwardmovement of the shed apex relative to the front reversal point of thereed. By means of this relative movement between the shed apex and thefront reversal point of the reed, the individual weft threads areassured of being beaten into the shed apex by the reed, either directlyadjoining the finished fabric (full beat), or else at a certain distancefrom the fabric (partial beat), depending on the desired pileloop lengthof some 1 to 2 centimeters (cm),in the finished fabric. In the case ofthe so-called three-shot weaves, one full beat is followed by twopartial beats; and in the case ofa four-shot weave, one full beat isfollowed by three consecutive partial beats. The groups of partial andfull beats are repeated so long as terry cloth is to be produced.

lfsmooth cloth (without pile loops) is to be produced from time to timeduring the weaving operation, this can be done by having the reed makeonly full beats until pile loops are to be made again. The changeovercan be by any suitable known process, e.g., by means of a Jacquardmechanism, or an eccentric mechanism, or a cardan-shaft mechanism.

During partial beats, the inserted weft threads are at first in fairlyloose contact, at the aforesaid spacing from the last threads, while theweft threads beaten in by full beats are in contact with the ground warpthreads as well as with the pile warp threads. As the last beat for eachWeft-thread group is usually a full beat, all the weft threads of thegroup which had been partially beaten since the last full beat, becomepushed forward together along the tightly tensioned ground warp threads,until they become set against the previously formed fabric. Thepile-loop threads which are sub jected to but little or no tension, arefirst, spaced from the fabric between the first partially beaten weftthreads, and at the next full beat are pushed forward, together with thepartially-beaten Weft threads, and are compacted such that the desiredpile loops become formed. In this way, the ground warp threads and theweft threads hold the finished ground fabric completely together, andthe pile loops stand out, depending on the texture employed, either onone side of else on both sides of the ground weave. 7

In order to allow the pile warp threads to offer as little resistance aspossible to the pulling back and pushing forward done by the reed atleast during the full beats for forming the pile loops, while the groundwarp threads remain tensioned tautly during all beats of th reed,various contrivances have been used.

For example, in some known warp-threads relaxing contrivances, thewarp-thread groups, both of the ground warp and also of the pile warp,are relaxed either while overcoming a braking force acting on the warpbeam (which may be periodically variable) or else are relaxedintermittently from the warp beam by means of a control warp-beam drive.In this way, as already mentioned, different thread tensions aremaintained for the ground warp and for the pile warp. ln these cases,the warp-threads group is usually run over a tensioning beam anddiverted into the weaving plane. The warp-threads group is then runthrough a warpthreads control system and forms a shed which iscontrolled by the weaving shafts. The weft threads are then insertedinto the shed and beaten up into the apex of the shed by a reed.

As can be appreciated that various contrivances which have been used torelax the pile warp threads have certain disadvantages. For example,there is a considerable amount of friction generated between the pilewarp threads and the contrivances during the loop forming operations.Also, large inertia forces must be overcome in creating a braking forceon the warp beam.

Accordingly, it is an object of this invention to avoid damage to thepile warps being delivered from a warp beam to a shed in a terry clothloom.

It is another object of the invention to permit relaxing of the tensionin pile warps without braking ofa tensioning beam.

It is another object of the invention to reduce the frictional forces onpile warps during terry cloth weaving.

Briefly, the concept of the invention is to make the tensioning beam ofa terry cloth loom which is used for the groundwarp threads as a normalrelatively massive oscillating beam, which because of the inertia fromits mass, at the instant of the-peak tension occurring at the beat of areed into the threads, opposes a resistance, and thus holds the groundwarp threads tautly stretched, while the pile warp threadsare deflectedout of a normal thread path by a guide means having a resilientlyyieldable guide member. This guide member is used to determine the pilewarp thread tension and has as little mass as possible, and thus hasonly small massinertia. in this way, the'guide member under theinfluence of the peak tension produced in the pile warp threads by theimpact of the reed, yields, and facilitates the described slip-forwardmovement of the pile warp threads during the full beat of the reed.

In accordance with the invention, the guide means for the pile warpthreads is made as a non-rotatable deflecting beam having a rigidsupport extending across the width of a thread-group, and an elasticyielding guide member secured to the support that yields under theinfluence of varying thread tension. This guide member which can be madeof laminated material, has an elongated surface, which is curved andextends continuously in its lengthwise or longitudinal direction acrossthe width of the thread-group, for guiding the pile warp threads.

The rigid support may be disposed in a fixed location in the loomhousing, and may have any desired cross section, for example, tubular.However, the support may also be mounted so as to pivot about an axisparallel to the longitudinal axis of the support. This construction canin a way known per se be used for controlling the drive of the pile-warpbeam in such a way that themean pile warp threadtension can be kept at aconstant desired small value. A means may also be provided, in a wayknown per se that acts on the support, for example, by means of a springor by utilizing the force of gravity, for the purpose of producing aprestress counter to the pivoting caused by the tension of the warpthreads.

In one embodiment of the invention, the yielding guide member is in theform of a band curved similarly to the surface of a cylinder, andenclosing the rigid support part, at least partly.

In order to obtain particularly great flexibility of the striplike guidemember, the member can be fastened to the rigid support only at oneside; that is, along one longitudinal edge. As a suitable guide surface,the other free longitudinal edge is made as a cylindrical surface of asmall radius of curvature, so as to avoid any damage to the threadslying thereon.

In another embodiment ofthe invention, in order to keep the curvature ofthe guide surface within limits, the striplike guide membermay, however,be fastened to the rigid support along both longitudinal edges. Withsuch a form of construction, the danger of dirtying by dust or fluff issubstantially reduced.

In still another embodiment, an elastic damping element is disposedbetween the support andthe inner side of the elastic guide member sothat any vibrations produced through the impacts of the reed becomeeffectively countered. Moreover, in this way there is obtained theadditional possibility, while using the same strip-material andimparting the same external shape, of making guide surfaces of differentflexibility. The support can be made of any desired known material,e.g., an elastic foam-material, or of an inflatable hose.

The support can have at least one support surface which is turned towardthe inside of the flexible guide member and extends parallel to thelongitudinal direction of the deflecting beam, whereby the dampingelement is held between this support surface and the inside of the guidemember. With such a construction, there is no need to provide specialattachment, e.g., adhesion or vulcanizing of the damping element to oneof the other parts. The damping element is compressed between thesupport surface and the inside of the guide member, and it is possible,through a suitable configuration of the support surface and a suitablecurvature of the guiding-member to obtain a certain behavior of therestoring force as a function of the bending of the guide member.

The elastically yielding guide member may however also consist of asheet formed into a closed tube, fastened, through the intermediary ofthe damping support element, to the rigid support. In this case, thetube may, in a position of rest, be disposed concentric of thelongitudinal axis of the rigid support. This is particularlyadvantageous when the support is disposed to be able to turn about itslongitudinal axis, so that the warp threads, during weaving, are able toroll over the deflecting beam, instead of sliding. The warp threads canthus receive particularly careful treatment, and undesirable rubbing andfriction is avoided. I

These and other objects and advantages of the invention will become moreapparent from the following detailed description and appended claimstaken in conjunction with the accompanying drawings in which:

' FIG. 1 illustrates a cross sectional view'of a deflecting beam inaccordance with the invention which has a tubular rigid support of roundcross section and a flexible strip-steel guide member fastened to thesupport by both longitudinal edges;

FIG. 2 illustrates a view similar to FIG. 1 of a modified deflectingbeam according to the invention utilizing a support of hexagonalcross-section;

FIG. 3 illustrates a cross sectional view of a deflecting beam having aflexible striplike guide member fastened to the support only along onelongitudinal edge; FIG. 4 illustrates a cross-sectional view of adeflecting beam formed from a strip closed into a tube, fastened with anintermediate support element, to a rigid support in accordance with theinvention;

FIG. 5 is a greatly simplified perspective view ofa deflecting beamaccording to the invention, with a cross section similar to FIG. 1 witha rigid support mounted to be able to pivot about an axis parallel to alongitudinal axis, and with a means to produce a prestress counter tothe pivoting resulting from the tension of the threads;

FIGS. 6 to 11 each illustrates cross-sectional views of otherembodiments of a deflecting beam according to the invention.

FIG. 12 diagrammatically illustrates a weaving machine for weaving terrycloth including a pivotal deflecting beam as shown in FIG. 5 inaccordance with the invention.

In the various Figures, like reference characters indicate likecomponents. Also, for simplicity, the details of a terry cloth loom forwhich the deflecting beam of the invention are not shown or particularlydiscussed as such are notoriously well known to those skilled in theart.

Referring to FIG. 1, the deflecting beam which is incorporated in aterry cloth loom FIG. 12 between a pile warp thread beam 117 and a warpstop motion 113, 114 in which a reed 115 operates includes a rigidsupport 1 in the form of a round tube and an elastically yieldable guidemember 2 formed from a wide strip of spring steel, which surrounds thesupport 1, and is likewise tubular. The two longitudinal edges of themember 2 are fastened tightly, by means of an underlay bar 3 and a rowof screws 4, to the support 1. The plane of symmetry of this deflectingbeam is set at a slant, and coincides approximately with theangle-bisector between the planes of the incoming group of warp threads5 (coming from the warp beam 117 for example) and the outgoing group ofthreads 6 (going toward the shed). The position of the guide member 2and of the threads 5, 6 rest without tension against the curved guidesurface of the member 2 which extends between the two edges of themember 2. When the group of threads 5, 6 becomes tensioned (for example,through the impact of the reed 115, then the cross-section of the member2 becomes distorted into an approximately symmetrical ellipse 2', whoseminor axis is still situated approximately in the angle-bisector betweenthe incoming threads 5 and the outgoing threads 6". If the tension ofthe threads relaxes, then the member 2 reassumes its originalapproximately cylindrical shape.

Referring to FIG. 2, the rigid support 11 can alternatively be made as ahexagonal tube. The two lengthwise edges of the striplike guide member12 are then clamped tightly to two different adjacent side surfaces ofthe hexagonal tube, in each case by means of an underlying bar 13 and arow of screws 14. The planeof symmetry of the deflecting beam in thiscase is set vertically, so that the resultant of the thread-tensionforce no longer coincides with the plane of symmetry. When the group ofthreads 5, 6 becomes tensioned, the cross section of the guide member 12becomes deformed, no longer symmetrically but toward the right-handside, as viewed, into an egg-shaped pear 12'. For the rest, the way inwhich the individual elements work is in the same as with FIG. 1, exceptfor a slight torsional stressing of the deflecting beam.

Referring to FIG. 3, while the rigid support 21 is made similarly tothat of FIG. 1, its plane of symmetry is turned about 90 clockwise.Also, the striplike guide member 22 is no longer made symmetrical as inFIG. 1, but is fastened in cantilever fashion to the support 21 at onlyone longitudinal edge, namely, the left-hand one as viewed. Under theinfluence of increased thread tension this guide member 22 becomesdeformed from 22 to 22'. As shown, the guide surface of the guide member22 is formed on a smaller radius of curvature at the free edge to passunder the threads 5, 6 so as to avoid sharp or rough edges coming incontact with the threads 5, 6.

Referring to FIG. 4, the elastically yieldable guide member 32 is formedfrom a steel sheet bent into a closed tube, welded, for example,together by a lengthwise seam. The rigid support 3l\is likewise made asa round tube, free to turn about a longitudinal axis as shown by thedouble arrow 38. The guide member 32 is in the position of restconcentric of the support 31, and the cylindrical gap between thesupport '31 and member 32 is filled with a soft damping foam-materialsupporting element 37, by which the member 32 is fastened to the support31. At the occurrence of tension peaks, the deflecting beam becomesdeformed, in that the guide member deflects into the approximateposition 32' shown by dot-dash lines. Thisform of construction isnormally stiffer that that of FIG. 3, and is particularly suitable forstronger pile threads. Through the ability of the support 31 to turn,friction of the threads against the guide surface is largely avoided.Dust and fluff can, in this case, not become deposited in the interiorof the guide member 32.

Referring to FIG. 5, the deflecting beam has a crosssection whichcorresponds approximately to that of FIG. 9, and consists of a rigidsupport 51 made from a hexagonal tube, which is mounted pivotably, bymeans of levers 53 at both ends, about an axis 54 paralleland spaced toits longitudinal axis. The guide member 52 is made from a strip ofspring-steel, fastened by both its lengthwise or longitudinal edges tothe support 51, and under the influence of the tension acting on thethreadgroups 5, 6', becomes deformed similarly to FIG. 2. As is shown inFIGS. 5 and 9, the guide member 52, 52, respectively is not closed up onitself and does not completely surround the support 51, but is fastenedto two non-adjacent side faces of the hexagonal support 51. In addition,as shown in FIG. 5, a means such as a'spring 55, for producing aprestress counter to the pivoting caused by the thread tension (that is,counter to the pivoting effected by the resultant of the tension of thethreads-group 5', 6) is provided which tends to turn the levers 53 inthe direction indicated by the arrow 56. Instead of using a spring 55,it is also possible to make use of the force of gravity, or of someother constant or intermittent force from some power source which actsin a similar manner. Such an arrangement may be particularly importantwhen, for some reason, the friction of the threads 5', 6' against theguide surface of the guide member 52' is too great, or when theoperation of the pivotable mounting is required as a control device forthe drive of the warp beam (active relaxation of the warp threads). Asshown, the spring 55 is fixedly secured at one end to the housing of theloom and at the opposite end to a lever 53 in any suitable manner.

In operation, the pile warp threads travel over the curved guide surfaceof the guide member 52' while travelling in a predetermined path to theshed (not shown). At the occurrence of a full beat of the reed (notshown), the pile warp threads are pulled forward from their untensionedposition so as to be tensioned. At this time, the tension in the pilewarp threads causes the guide member 52 to deform and deflect in adirection towards the shed, i.e., to the right as viewed, in a mannersimilar to the guide members 2, 12 described above.

Other forms of deflecting beams can also be used in the manner describedabove. For example, referring to FIG. 6 which to a great extentcorresponds to FIG. 1, the support 41 consists of a rigid hexagonal tubewith a plane of symmetry relative to the mounting screw 3 set vertical.In FIG. 7, the deflecting beam has a support 41 with a plane of symmetryset at a slant, an outer form similar to FIG. 6, and a support surface42 running parallel to the longitudinal axis of the support 41. Inaddition, a damping elastic support element 43, e.g., a softfoam-material, or even an inflatable hose, is held between this supportsurface 42 and the inner side of the guide member 2. During thedeformation of the guide member 2 under the tension of the threads, thesupport element 43 likewise becomes deformed and compressed and rolls toand fro on the support surface 42. The support surface 42 does not needto be a plane surface, as shown in FIG. 7, but may be any desiredcylindrical surface, approximately parabolicor cylindrical, curvedconvexly or concavely. By means of the shape imparted to the supportsurface 42, it becomes possible to fix a desired pattern of restoringforce as a function of the deviation caused by the thread tension.

Referring to FIG. 8, the gap between the tubular support 1 and the innerside of the guide member 2 can be partly filled by a damping andstiffening support element 44, made, for example, of an elastic foammaterial as shown. Finally, as shown in FIGS. 10 and 11 constructionsthat work similarly to the forms of FIGS. 9 or 2, use a tube of squarecross section, 61 and 71 respectively, which may be particularlysuitable for certain cases, instead of hexagonal tube for reasons ofavailable space or other constructional or economic reasons.

The corresponding guide members are numbered 62 and 72, respectively.

Referring to FIG. 12, the terry cloth weaving machine utilizes a groundwarp 111 which runs off a ground warp beam 112 and passes .througha rowof warp stop motion droppers 113, heald shafts 114 used for shedding anda reed 115. As viewed, the shed is open. A weft is picked by a shuttle116. In known manner, pile loops 121 are formed from a pile warp 5'.which runs off a pile warp beam 117 and is deflected when passing theguide member 52 affixed to the rigid support 51 of the deflecting beamaccording to the invention (see FIG. After deflection, the pile warp 6'passes through another row of stop motion droppers 119, heald shafts 120and the reed 115. In a manner known per se, the deflecting beam ismounted pivotably (arrow 56), by means of levers 53 at both ends,

about an axis 54, and biased by the spring 55 to produce a substantiallyconstant pile warp tension.

In the embodiment illustrated, the pile loops 121 are formed by means ofa reciprocating motion superimposed on the normal take-up motion of thecloth 122 and produced by means of a periodically reciprocating breastbeam 123. To this end, the breast beam has a drive 130 connected to themain shaft (not shown) of the loom,- which can transfer the beam 123over a distance h from a limit position as illustrated into a position123' as shown by chain lines, thereby moving the fell of the cloth overa distance 11' with respect to the beat up point 115' oftlze reed 115.

On leaving the breast beam, the cloth 122 runs onto a cloth draw-offroller 124, which is driven in a known manner at a speed correspondingto the formation of the cloth. From the cloth draw-off roller 124, thecloth 122 runs over a pinch roller 125 and is wound onto a cloth beam126.

The essence of the invention is not tied to the examples of constructionwhich have been described. In particular, the method of attaching therigid support to the machine frame, or its position in its operativestate, may be altered as desired. Instead of a tube, which is of itselfeconomically advantageous, any other bending-resistant form ofconstruction, e.g., a double-T or an angle-profile, may be provided.When economic reasons do not prohibit such, it is also possible to makeuse of a massive bar or roll. Further, the damping element may befastened to the rigid support and, in the position of rest, not contactthe inner side of the yieldable guide member but do this only after acertain bending (deformation) of the guide member has occurred. That is,the damping element may, as shown in FIG. 3, be made with a kind ofbuffer 23. The essential thing is only that the guide member shall beelastic and easily deformable, and have a small movable mass.

Deflectin'g beams of the described kind may be installed in a loom forspecial purposes, and also for purposes other than that of a pile-warpbeam. Also, these deflecting beams do not need to extend across theentire weaving width of the machine. It suffices for their length to besuitable for the width of the group of threads to be deflected thereby.Thus, for example, it is possible to imagine that over a part of thewidth of the weave of a special pattern, or in the case of specialdesigns, a part of the warp threads consists of fancy yarns,particularly delicate or elastic yarns, that have to be woven with lessthread tension than ordinarily. In this case, use may also be made of adeflecting beam according to the invention, without the threads-groupconcerned, and thus the deflecting beam, having to extend across theentire width of the weave. It is also obvious that the deflecting beamof the invention may also be used to deflect normal ground warp threads.

1. A deflecting beam for warp threads in a terry cloth loom comprisingan elongated rigid non-rotatable support for disposition across the pathof the warp threads and an elastically yieldable guide member secured tosaid support, said guide member having two longitudinal edges secured tosaid support and an elongated curved surface extending between saidedges and across the path of the warp threads for sliding of the 2. Adeflecting beam as set forth in claim 1 wherein I said support istubular in cross-section.

3. A deflecting beam as set forth in claim 1 wherein said guide memberis a metal strip at least partially surrounding said support and saidsurface is a cylindrical surface,

4. A deflecting beam as set forth in claim 1 further comprising anelastic damping element between said support and said guide member.

5. A deflecting beam as set forth in claim 4 wherein said support has atleast one support surface facing said guide member and extendingparallel thereto with said damping element therebetween.

6. A deflecting beam as set forth in claim 5Wherein said damping elementis made of foam material.

7. A deflecting beam'as set forth in claim 5 wherein said dampingelement is an inflatablehose.

8.- A deflecting beam as set forth in claim 5 wherein said guide memberis a closed tube of metal sheet material and said damping element issandwiched between said support and said guide member.

9. In combination with a deflecting beam as set forth in claim 1, meansfor pivoting said support about an axis spaced to and parallel to thelongitudinal axis of said support.

10. The combination as set forth in claim 9 which further includes meansfor prestressing said support in a second direction opposite said firstdirection.

11. In a loom for weaving terry cloth, said loom having means fordirecting pile warp threads through a predetermined path into a shed andmeans for beating up weft threads in said shed wile imparting tension toground warps; a non-rotatable deflecting beam mounted in said loom andhaving a support for disposition across the path of the pile warpthreads and an elastically yieldable guide member secured to saidsupport, said guide member having two longitudinal edges secured tosaid'support and an elongated curved surface made of leaf-spring likematerial extending between said edges and across said path of said pilewarp threads for sliding of said pile warp threads thereon, said beamsurface being resiliently mounted in said loom to deform in a directionaway from said path under the tension of said pile warp threads, saiddirection coinciding with the angle bisector between the planes of anincoming group of the pile warp threads and an outgoing group of thepile warp threads.

12. In a loom for weaving terry cloth as set forth in claim 11 whereinsaid beam includes a deformable element between said support and saidguide member.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent 3.871l4l9Dated March 18. 1975 Inventor (s) ERWIN It is certified that errorappears in the above-identified patent and that said Letters Patent arehereby corrected as shown below:'

Column 1, line 8, "group" should be -ground-.

Column 5, line 47-48, "cros-ssection" should be --cross-section-.

Claim 11 line 45, "wile" should be -while--.

Signed and Scaled this twenty-second Day of July 1975 [SEAL] Arrest:

RUTH c. MASON I c. MARSHALL DANN Arresting Offitfl Commissioner ofPatents and Trademarks

1. A deflecting beam for warp threads in a terry cloth loom comprising an elongated rigid non-rotatable support for disposition across the path of the warp threads and an elastically yieldable guide member secured to said support, said guide member having two longitudinal edges secured to said support and an elongated curved surface extending between said edges and across the path of the warp threads for sliding of the threads thereon, said surface being curved similarly to a cylindrical surface to at least partly surround said support, said guide member being made of leaf-spring like material for resiliently deforming under the influence of a variable tension in the threads in a direction away from said path coinciding with the angle bisector between the planes of an incoming group of the warp threads and an outgoing of the warp threads.
 2. A deflecting beam as set forth in claim 1 wherein said support is tubular in cross-section.
 3. A deflecting beam as set forth in claim 1 wherein said guide member is a metal strip at least partially surrounding said support and said surface is a cylindrical surface.
 4. A deflecting beam as set forth in claim 1 further comprising an elastic damping element between said support and said guide member.
 5. A deflecting beam as set forth in claim 4 wherein said support has at least one support surface facing said guide member and extending parallel thereto with said damping element therebetween.
 6. A deflecting beam as set forth in claim 5 wherein said damping element is made of foam material.
 7. A deflecting beam as set forth in claim 5 wherein said damping element is an inflatable hose.
 8. A deflecting beam as set forth in claim 5 wherein said guide member is a closed tube of metal sheet material and said damping element is sandwiched between said support and said guide member.
 9. In combination with a deflecting beam as set forth in claim 1, means for pivoting said support about an axis spaced to and parallel to the longitudinal axis of said support.
 10. The combination as set forth in claim 9 which further includes means for prestressing said support in a second direction opposite said first direction.
 11. In a loom for weaving terry cloth, said loom having means for directing pile warp threads through a predetermined path into a shed and means for beating up weft threads in said shed wile imparting tension to ground warps; a non-rotatable deflecting beam mounted in said loom and having a support for disposition across the path of the pile warp threads and an elastically yieldable guide member secured to said support, said guide member having two longitudinal edges secured to said support and an elongated curved surface made of leaf-spring like material extending between said edges and across said path of said pile warp threads for sliding of said pile wArp threads thereon, said beam surface being resiliently mounted in said loom to deform in a direction away from said path under the tension of said pile warp threads, said direction coinciding with the angle bisector between the planes of an incoming group of the pile warp threads and an outgoing group of the pile warp threads.
 12. In a loom for weaving terry cloth as set forth in claim 11 wherein said beam includes a deformable element between said support and said guide member. 